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Dec 17th, 2018
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  1. // c#
  2. int[,] m = new int[w, h];
  3. // fill matrix m
  4. for (int i = 0; i < 2 * (w + h - 2); ++i)
  5. {
  6. int e = i < w - 1 ? m[i, 0]
  7. : i < w + h - 2 ? m[w - 1, i - w + 1]
  8. : i < 2 * w + h - 3 ? m[2 * w + h - 3 - i, h - 1]
  9. : m[0, 2 * (w + h - 2) - i];
  10. // do something with element e
  11. }
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